Related Clues:

• Where fleets sail
• Home for Davy Jones
• Word with legs or air
• It has a floor but lacks a ceiling
• See 68-Across
• See 55-Down
• See 63-Down
• Kind of horse
• Captain's domain
• With 23-Down, treasure hunters
• Huge quantity
• World leader?
• Limitless quantity
• -
• Vacation locale, with 'the'